Hurricanes Nature’s Tropical Cyclones

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What Are Hurricanes? Tropical cyclones (lows) with sustained winds of more than 74 mi/h. Normal sea level air pressure is 1010 mb In hurricanes air pressure can reach 900mb 882 mb Hurricane Wilma 2005

Where do they form? Hurricanes form over oceans when water temperatures reach above 80 degrees.

Where do they form? Hurricanes form over the Atlantic Ocean Indian Ocean: Tropical Cyclones Western Pacific Ocean: Typhoons

When do they form? Atlantic Hurricane Season runs from June through November. Needs water temperature above 80 degrees Needs water temperature above 80 degrees 2005 had storms into December 2005 had storms into December

How Do Hurricanes Form

Hurricanes get their energy from warm, humid air from the oceans surface. Winds spiral counter- clockwise same as all low pressure in northern hemisphere.

How Do Hurricanes Form Lowest air pressure is found in the eye of the hurricane Low pressure forms due to the warm moist air rising

The Eye Of A Hurricane Eye of Hurricane Center of storm Center of storm Lowest Pressure Lowest Pressure Calmest Winds Calmest Winds Clear Skies Clear Skies

Eye of a hurricane Eye Wall: Area around eye Area around eye Most intense part of storm Most intense part of storm Surrounded by huge cumulonimbus clouds Surrounded by huge cumulonimbus clouds

Hurricane Eye

Hurricane Intensity

Hurricane Damage Storm Surge: “Wall” of water that comes onshore with storm “Wall” of water that comes onshore with storm Most dangerous impact from hurricanes Most dangerous impact from hurricanes

Hurricane Damage